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252b5132 RH |
1 | /* Like vsprintf but provides a pointer to malloc'd storage, which must |
2 | be freed by the caller. | |
3 | Copyright (C) 1994 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of the libiberty library. | |
6 | Libiberty is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | Libiberty is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with libiberty; see the file COPYING.LIB. If | |
18 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #ifdef __STDC__ | |
22 | #include <stdarg.h> | |
23 | #else | |
24 | #include <varargs.h> | |
25 | #endif | |
26 | #include <stdio.h> | |
27 | #include <string.h> | |
28 | #include <ansidecl.h> | |
29 | ||
30 | #ifdef TEST | |
31 | int global_total_width; | |
32 | #endif | |
33 | ||
34 | unsigned long strtoul (); | |
35 | char *malloc (); | |
36 | ||
37 | static int | |
38 | int_vasprintf (result, format, args) | |
39 | char **result; | |
40 | const char *format; | |
41 | va_list *args; | |
42 | { | |
43 | const char *p = format; | |
44 | /* Add one to make sure that it is never zero, which might cause malloc | |
45 | to return NULL. */ | |
46 | int total_width = strlen (format) + 1; | |
47 | va_list ap; | |
48 | ||
49 | memcpy ((PTR) &ap, (PTR) args, sizeof (va_list)); | |
50 | ||
51 | while (*p != '\0') | |
52 | { | |
53 | if (*p++ == '%') | |
54 | { | |
55 | while (strchr ("-+ #0", *p)) | |
56 | ++p; | |
57 | if (*p == '*') | |
58 | { | |
59 | ++p; | |
60 | total_width += abs (va_arg (ap, int)); | |
61 | } | |
62 | else | |
63 | total_width += strtoul (p, &p, 10); | |
64 | if (*p == '.') | |
65 | { | |
66 | ++p; | |
67 | if (*p == '*') | |
68 | { | |
69 | ++p; | |
70 | total_width += abs (va_arg (ap, int)); | |
71 | } | |
72 | else | |
73 | total_width += strtoul (p, &p, 10); | |
74 | } | |
75 | while (strchr ("hlL", *p)) | |
76 | ++p; | |
77 | /* Should be big enough for any format specifier except %s and floats. */ | |
78 | total_width += 30; | |
79 | switch (*p) | |
80 | { | |
81 | case 'd': | |
82 | case 'i': | |
83 | case 'o': | |
84 | case 'u': | |
85 | case 'x': | |
86 | case 'X': | |
87 | case 'c': | |
88 | (void) va_arg (ap, int); | |
89 | break; | |
90 | case 'f': | |
91 | case 'e': | |
92 | case 'E': | |
93 | case 'g': | |
94 | case 'G': | |
95 | (void) va_arg (ap, double); | |
96 | /* Since an ieee double can have an exponent of 307, we'll | |
97 | make the buffer wide enough to cover the gross case. */ | |
98 | total_width += 307; | |
99 | break; | |
100 | case 's': | |
101 | total_width += strlen (va_arg (ap, char *)); | |
102 | break; | |
103 | case 'p': | |
104 | case 'n': | |
105 | (void) va_arg (ap, char *); | |
106 | break; | |
107 | } | |
108 | } | |
109 | } | |
110 | #ifdef TEST | |
111 | global_total_width = total_width; | |
112 | #endif | |
113 | *result = malloc (total_width); | |
114 | if (*result != NULL) | |
115 | return vsprintf (*result, format, *args); | |
116 | else | |
117 | return 0; | |
118 | } | |
119 | ||
120 | int | |
121 | vasprintf (result, format, args) | |
122 | char **result; | |
123 | const char *format; | |
124 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) | |
125 | _BSD_VA_LIST_ args; | |
126 | #else | |
127 | va_list args; | |
128 | #endif | |
129 | { | |
130 | return int_vasprintf (result, format, &args); | |
131 | } | |
132 | ||
133 | #ifdef TEST | |
134 | void | |
135 | checkit | |
136 | #ifdef __STDC__ | |
137 | (const char* format, ...) | |
138 | #else | |
139 | (va_alist) | |
140 | va_dcl | |
141 | #endif | |
142 | { | |
143 | va_list args; | |
144 | char *result; | |
145 | ||
146 | #ifdef __STDC__ | |
147 | va_start (args, format); | |
148 | #else | |
149 | char *format; | |
150 | va_start (args); | |
151 | format = va_arg (args, char *); | |
152 | #endif | |
153 | vasprintf (&result, format, args); | |
154 | if (strlen (result) < global_total_width) | |
155 | printf ("PASS: "); | |
156 | else | |
157 | printf ("FAIL: "); | |
158 | printf ("%d %s\n", global_total_width, result); | |
159 | } | |
160 | ||
161 | int | |
162 | main () | |
163 | { | |
164 | checkit ("%d", 0x12345678); | |
165 | checkit ("%200d", 5); | |
166 | checkit ("%.300d", 6); | |
167 | checkit ("%100.150d", 7); | |
168 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ | |
169 | 777777777777777777333333333333366666666666622222222222777777777777733333"); | |
170 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); | |
171 | } | |
172 | #endif /* TEST */ |